Bk Mueller 511-404HN Malleable Iron End Cap 3/4 in Threaded

Product Description

The BK MUELLER 511-404HN is a 3/4 inch threaded malleable iron end cap rated for 300 psi liquid and gas service and 150 psi steam service. This Class 150 fitting is galvanized for corrosion resistance and accepts standard NPT threaded pipe to close off a pipe run. It is used in plumbing, HVAC piping systems, gas distribution lines, and industrial pipe assemblies. Licensed plumbers, pipefitters, and mechanical contractors install this fitting as part of new construction or repair work on threaded iron pipe systems.

This end cap is suited for residential and light commercial applications involving low-pressure gas, liquid, or steam piping. It terminates a threaded pipe branch or run and is a standard component in black and galvanized iron pipe systems found in boiler rooms, mechanical rooms, gas supply lines, and water distribution systems. The 3/4 inch size is among the most common in residential and light commercial pipework.

Key Features

• 300 psi liquid and gas pressure rating for reliable service in low-pressure systems
• 150 psi steam pressure rating suitable for Class 150 steam piping
• Malleable iron construction provides strength and resistance to impact and vibration
• Galvanized finish adds corrosion protection for extended service life
• Threaded end connection accepts standard NPT pipe for straightforward installation
• Class 150 fitting compatible with standard Class 150 threaded iron pipe systems

Compatibility

Designed as an OEM-style replacement or standard component for Class 150 threaded malleable iron pipe systems in residential and commercial plumbing, gas, and steam applications.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local codes, the International Plumbing Code (IPC), and the International Fuel Gas Code (IFGC) where gas service is involved. Shut off and depressurize the line completely before threading on the cap. Apply an appropriate thread sealant or pipe compound rated for the service medium before making up the joint. Do not exceed the rated pressure for the applicable service type.